POWERbreathe K5

Advanced Live Feedback Software - Electronic


Best Innovation for Human Performance Award Winner

Choose POWERbreathe K5:

  • For inspiratory muscle training (IMT), testing, warm-up, cool-down, graphical results, and advanced Breathe-Link Live Feedback Software
  • For a max of 30 user/client profiles - 1200 stored sessions per user

K5 Features:

  • Auto-optimising IMT - automatically adapts to your training requirements
  • Training Intensity - can be set to ‘auto’ or ‘manual’ for increasing/decreasing load intensity (cmH2O)
  • Training Guidance - guides you to breathe at an appropriate rate
  • Training Results - scroll between results for Load, Power, Volume, Flow and Energy
  • Single Breath Test - measures inspiratory muscle strength, peak inspiratory flow rate and inhaled volume in a single breath
  • Warm-up & Cool-down - automatically sets the optimal resistance for inspiratory muscle warm-up and cool-down
  • Training History - displays a graphical history of your last 36 training sessions allowing you to review trends and previous personal best results
  • Breathing Energy - measures the mechanical work of breathing during your breathing session
  • Breathe-Link Software - Windows and Mac connectivity via USB enables real-time training and performance testing
  • Breathe-Link Pro-View - use this for advanced, detailed, simultaneous plotting and analysis of all IMT data
  • Breathe-Link Custom - allows you to create and upload your own personalised breathing training sessions


The K5 software is PC compatible (except for Windows 10 S for which it is not compatible).

It is also MAC compatible, working on the following MAC OS. Mac software will only work for x86_64 bit architecture.

  • Version 10.9: "Mavericks”
  • Version 10.10: "Yosemite”
  • Version 10.11: "El Capitan"
  • Version 10.4: "Tiger"
  • Version 10.5: "Leopard"
  • Version 10.6: "Snow Leopard"
  • Version 10.7: "Lion"
  • Version 10.8: "Mountain Lion"

POWERbreathe is a scientifically proven Inspiratory Muscle Training (IMT) device, developed by leading scientists for improving the strength and endurance of the muscles used to breathe in, primarily the diaphragm and intercostals / rib cage muscles.

As with any other muscle, respiratory muscles can be trained so that they are more resistant to fatigue. This resistance to fatigue results in reduced breathlessness and enhanced exercise tolerance. 

  • Third generation POWERbreathe Inspiratory Muscle Training (IMT) device
  • World’s first electronic variable threshold resistance training device for adaptable, personalised training
  • Simple LCD menu system for navigating through different settings and to view training results 
  • Rechargeable - recharging stand included
  • Washable valve head and mouthpiece - DO NOT immerse the handset or expose it to running water
  • Drug-free - no side effects or drug interactions
  • 2010 Consumer Product Design of the Year

Breathing physiology indicates that when your lungs are empty the breathing muscles are at their strongest. However, as they fill up with air they start to lose strength and therefore at high loads they can’t maintain a full contraction throughout an entire breath.

The POWERbreathe K-Series uses Electronic Variable Threshold Resistance Training to overcome this. This type of training offers a tapered loading resistance to match the contraction curve of your own breathing muscles throughout your entire breath. This enables you to complete a full breath and muscular contraction at an optimal resistance.

The K-Series will automatically adapt to increases in your inspiratory muscle strength at the beginning of each training session.

This study concluded that the K-Series device "provides automatically processed and valid estimates of physical units of energy during loaded breathing tasks..."

Measurement validity of an electronic inspiratory loading device during a loaded breathing task in patients with COPD

This study suggests that S-Index might be more appropriate for measuring inspiratory muscle performance than the currently most used test, PImax...

Assessment of Maximum Dynamic Inspiratory Pressure

How to use:

Full instructions are provided in the User Manual. Quick Start:

  1.  Charge the unit.
  2.  Power on.
  3.  Select Start from the menu then select Train.
  4.  Put the nose-clip on.
  5.  Breathe - until you hear the beep. Repeat for 30 breaths.
  6.  View Results 


Your POWERbreathe will be exposed to saliva during use. We recommend that a few times a week you remove the valve head with mouthpiece and soak it in warm water for about 10 minutes (see POWERbreathe Manual for full details), but once a week soak the valve head with mouthpiece in a mild cleansing solution instead of water, using POWERbreathe Cleansing Tablets - only 1 tablet is required each time.

DO NOT immerse the handset or expose it to running water as this will damage the electronics.

POWERbreathe is drug free, suitable for almost anyone and should cause no harmful side effects when used properly. Please read the following precautions and contraindications to ensure that you use your POWERbreathe safely and appropriately.

If you have any doubts about POWERbreathe’s suitability, or you have a medical condition, please consult your doctor.


  • Do not make changes to any prescribed medication or prescribed treatment programme without consulting your doctor.
  • Do not use POWERbreathe if you are suffering from a ruptured eardrum.
  • To prevent the potential transmission of infections, we recommend that you do not share your POWERbreathe with other users, including family members.
  • This product is not intended to diagnose, treat, cure or prevent any disease.
  • POWERbreathe is designed for exercising your inspiratory muscles only. No other use is intended or implied.
  • Anyone who is under the age of 16 should only use POWERbreathe with supervision from an adult. POWERbreathe contains small parts and is not suitable for children under 7 years.
  • Whilst training with POWERbreathe you should feel resistance when inhaling but it should not be painful. If you should feel pain whilst using POWERbreathe, stop immediately and consult your doctor.
  • Some users may experience slight ear discomfort when training with Medic Plus, especially if they are recovering from a cold. This is caused by inadequate equalisation of pressure between the mouth and ears. If symptoms persist, please consult your doctor.
  • If you are suffering from a cold, sinusitis or respiratory tract infection, we advise that you do not use POWERbreathe until symptoms have disappeared. If in doubt, consult your doctor.
  • Refer to your Healthcare Professional before using POWERbreathe if you have any of the following conditions:
  1. A history of spontaneous pneumothorax (a collapsed lung that was not due to traumatic injury e.g. broken rib), as it may lead to a recurrence of the condition.
  2. Pulmonary hypertension o Large bullae on chest x-ray
  3. Marked osteoporosis with history of rib fractures
  4. Desaturation during or following IMT (<94%)


Inspiratory muscle training, such as training with POWERbreathe, is not recommended for patients with certain conditions, including the following:

  • Asthma patients who have low symptom perception and suffer from frequent, severe exacerbations or with an abnormally low perception of dyspnoea
  • If you are suffering from a ruptured eardrum or any other condition of the ear
  • Patients with marked elevated left ventricular end-diastolic volume and pressure
  • Patients with worsening heart failure signs and symptoms after RMT / IMT
  • If in doubt, consult your Healthcare Professional.
  • POWERbreathe IMT device comes with either a GB, AUS, EU or US plug (depending on your country of purchase)
  • Mouthpiece (PVC - not made with natural rubber latex or and phthalates)
  • Nose clip
  • Storage pouch
  • 4 cleansing tablets (These will be removed if shipping to the USA and the box resealed).
  • User manual
View Knowledge Base

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The POWERbreathe K5 has helped massively
Review by Liz McTernan
Posted 13 May 2015
Without a doubt, the POWERbreathe K5 has helped massively with my training and racing, so many thanks for a great product!